High Harmonic Generation Beyond the Electric Dipole Approximation
- 11 December 2000
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (24) , 5082-5085
- https://doi.org/10.1103/physrevlett.85.5082
Abstract
A generalization of the analytical theory of high harmonic generation in the long wavelength limit and in the single active electron approximation is developed taking into account the magnetic dipole and electric quadrupole interaction. Quantum mechanical and classical theories are found to be in excellent agreement, which allows one to explain the influence of multipole effects in terms of an intuitive picture. For Ti:S lasers ( 0.8 &mgr;m) multipole contributions are found to be small below an intensity of about 10(17) W/cm(2), at which harmonic radiation with photon energies of several keV is generated. This promises the extension of high harmonic generation well into the sub-nm wavelength regime.Keywords
This publication has 25 references indexed in Scilit:
- Intense few-cycle laser fields: Frontiers of nonlinear opticsReviews of Modern Physics, 2000
- Phase-Matched Generation of Coherent Soft X-raysScience, 1998
- Coherent 0.5-keV X-Ray Emission from Helium Driven by a Sub-10-fs LaserPhysical Review Letters, 1998
- Femtosecond time-resolved X-ray diffraction from laser-heated organic filmsNature, 1997
- Generation of Coherent X-rays in the Water Window Using 5-Femtosecond Laser PulsesScience, 1997
- Generation of Coherent Soft X Rays at 2.7 nm Using High HarmonicsPhysical Review Letters, 1997
- High-Harmonic Generation of Attosecond Pulses in the “Single-Cycle” RegimePhysical Review Letters, 1997
- High-order harmonic generation using intense femtosecond pulsesPhysical Review Letters, 1993
- High-order harmonic generation in rare gases with a 1-ps 1053-nm laserPhysical Review Letters, 1993
- Studies of multiphoton production of vacuum-ultraviolet radiation in the rare gasesJournal of the Optical Society of America B, 1987